Remote control and indicating system



L. M. 'POTTS REIOTE CONTROL AND INDICATING SYS'I'EI 2 Shoots-Sheet 1 Filed Nov. 27. 1925 lnvehfazt' 100/3. M Puff:

Oct. 30, 192&

- L. M. POTTS REMOTE CONTROL AND INDICATING SYSTEM 2 Sheets-Sheet 2 Filed Nov, 2'7, 192s actuated by an impulse delivered to the net, which magnet shifts the shutter to act.uf

Patented Oct. 30, l928.

f LOUIS m. roars,

rAnY, INCORPORATED, or NEW YORK,

E TENAEEY, NEW JERSEY, ASSIGNOR ro wEs'rEEu ELEc'rmcco r n. Y.,'A oonronmg'ron 01 N W Yonx.

EEMorE con'rnor. Ann inmoa'rmc" SYSTEM.

Application filed November 27, 1925.

This invention relates to remote control and supervisory systems. V

The object of this invention is to provide ,a system ofthis'character in which all the 5 required operations are taken care of with a minimum of equipment and which practically eliminates the false operation of the devices,

such as power switches, at the remote'station; In accordance with this invention only a single pair of conductors is provided between the control and remote stations and a novel type of distr' station synchronously operated, each distributor having only one electroma net which is common to all the sets of-switc contacts on the distributor,- these contacts being associated with theivarious devices at the remote station under control. This electromagnet is polarized to selectively operate ashutter in either of two directions, which shutter is carriedby a rotating member of the distributor in such a way, that the shutter passes in oper ative relaton to the contact sets in succession; This shut er when adjacent the desired set is 1 ate such set of springs in one of two ways, de-

, pending upon the character ofthe impulse which is, in turn, dependent upon the position of a control key previously setbythe dispatcher. The contact set when actuated isheld in such. osition and prepares a circuit to shift the evice, such as a power switch,

' nder control, toits alternateposition. This :15- circuit is closed by the distributornear the completion of its movement by a relay which is operated by acode of impulses transmitted from the distributor at the control station. This code is referably made up of a set of 4 impulses of ifierent polarity and since the relay can only operate on, the receipt of such code, thechance of false operation of the power switch. is" minimized, if not absolutely prevented. When the device shifts its posil ntion, it sets up a certain electrical condition on its set of contact springs on the distributor at the remote stati" n and when the actuating device on the distributor reaches this set of springs and actuates it, it transmits back to =43 the polarizedmagnet of the distributor at the central station an impulse the character of butor is employed, one ateach .stoppin positlon- Serial No. 71,s7a. x which is dependent upon the position the 'device has assumed. This magnet in operating shifts the shutter of,'the central "station. di'stributor inthe corresponding direction which 1 closes acircuit to operate a signal before the dlspatcher indicating to him that the device has responded properly. a .i This and other features of tlris invention will be apparent from the following'descrip- .tion. taken in connection with the attached drawings in which Fig. 1 is a schematic diagram of a control and supervisory system embodying this invention using two of the above mentioned distributors.

Fig. 2 is a schematic diagram of the distributor. i

Fig. 3 shows in detail means for actuating the contact springsof the-distributor in all but the last three positions.

.Fig. 4 "is similarto Fig. 3 for the last three positions of the distributor.

Fig. 5'

arrangementand the operating means at the 'ma ority ofv positions.

Fig. 6 showsth'e spring F1 shows the-operating slide used in the last t ree positions, and 1 1 I Fig. '8 shows the methodof operating the stopping lever.

shows in detail ,the contact spring arrangement'at the a Referring particularly to Fig. 2 a 'rotating disc 1; 1S fixed to a shaft 2 supportedlin suitable bearings only one of which is shown consisting of spring 4' one end of which is attached to hollow shaft 5 which is free. to

rotate aroundfshaft 2. The fother end of.

spring 4 is attached to an escapementwheel means. Wheel 6 is provided with teeth 7 at 3. The shaft is'drivenby aspring-motor 6 fixed to shift 2 by pins'or other equivalent with-which pawl 8 is adapted to cooperate. A

shaft 9 is supported in equipped with a sprin is fixed to one of the other end being fixed to a cam member I3 permanentl fixed to' shaft 9. Shaft 9 is'restrained from moving underthetension of spring 11 by means of lever 12' cooperating 11 one end of which frame members. 10, v

ame members 10, the

with the raised portion of cam;1 3'. ."Spring rat or 11 is so tensioned as to oscillate shaft '9 V the disc so that when it is than cause it to make a complete revolution. Also fixed to shaft 9 is a disc 14 on which is a fixed pin 15. Pin E ie-embraced in the forked or yoke portion of a lever 16, the other .5 endofwhlch lever is fixed to one end of shaft 17 which at its otherend carries pawl 8. Shaft 17 issup'ported by bearingscarried by frame members not shown.

When lever 12 is moved out of engagement with the raised portion of cam' 13 the sys-- tem is released and shaft 2is rotated step-bye step under the influence of spring 4 through v the train just described, in substantially the same manner as the second hand of a watch.

Attached to hollow shaft 5 at the end opposite spring 4 is a wheel 18 cooperating with u m'19 onshaft 20 of electrlc motor 21. A rd22 fixedin wheel 1 thro'u h he flanges of a member 23 in turn thre a e to cooperate with the threaded portion 24' f shaft 2. Shaft 20 is normally sta- .tionar thereby holdingwheel 18, shaft 5, rod 2 and member 23 against'rotation. As she 2 rotates member 23 is moved longitu- 5 diall of the shaft due to the cooperating threa s. The arm 25 of an electric' snap switch 26' is aetuated'by the movement-of member 23. Snap switch 26 controls the current supply through wires 27 for operating 30 -motor 21. e

The location of switch 26is such that when spring 4 is approximately unwound, switch 26 is operated by member 23 tosu'pply current r to motorj'21' causing it to rotate, .which, through worm 19 and wheel '18 will retension spring'4. Aswheel 18 rotatesmember 23 is-also rotated by means of rod 22 and if shaft 2 is also rotatinfg since it rotates at a speed less than that 0 wheel 18, member 23 will in any case be-m'oved longitudinally of the shaft and ciently tensioned, switch 26 will be operated to open the motor circuit'and hence bring the motor to rest. r i I Disc l is equipped witha shutter 29 capable of being moved toeither side of the disc.

shutter 29 is .of the same thickness. as in its mid position it becomes in effect a part of the discs The so shutterhowevenextends radiallysom'ewhat beyondithe periphery pf the disc so as to. v engage arm 12. Adjacent the shutter and" to the left thereof, as seen in Fig.2, discl is provided with'ainotch 28. I

The. movement or shutter-29 iscausediby j lever-3O pivoted to'the'disc at 81; Atjthe end 0f-,the lever awayfrom the shutter 'it'is attachedto .arod 32 positionedat one end in a.

j ho1e inthe'end of shaft 2. The other end 'of :0 rod 32 is pivotally. attached to an extension .33-of armature 34' of polarized electromag- 'net35.: "I

A stationary disc 36 supported by frame I members 37 carries .two series of contact M spring pile-ups represented generally by 38 8 passes freely when spring 4 has ,been sufiilast three positions for and 39 supported on extension pieces 40. 4 The main operating springs of these pile-ups are biased'to move tothe right as shown in Figs. 5 and 8 when' unrestrained. Four rings l 41, 42, 43 and 44 are positioned relative to disc 1 substantially as shown in Fig. 5 and are provided with slots 45 (Fig. 2) in which the: slides 46, 46, 346, 346' are adapted to movei, The'se rings are supported b bolts 47 which extend between and 48.

Adjacent the notch 28in disc 1 and attached to the disc are two comer'ging pieces 49 and 50. Ofl'set from the discsomewhat further but in the-same general location and also attached to the disc are two other converglngpieces '51 and 52. The shape and general location of these pieces may be more readily seen by referring to Figs. 3 and 4.

Piece 49 (Fig. 2) has a raised portion as shown on which lever 12 will ride before it is engaged by the shutter to stop the oscilla- (tiionslof the cam 13 and hence the rotation of The slides 46, 46' as shown in Fig. 5. On the upper edge the slldes are provided with a p'rOJecting piece adapted to actuate the main spring of the contact spring pile ups. On the lower edge of slide 46 there is also provided a projecting iece adapted to cooperate with shutter 29 or the actuation ofthe row of springs near the disc while pieces 51 and 52 engage the projection of slide 46' for the'series of springs more distant from the disc. The lower hori- .zontally extending'portion of the slides extend under the rings 41, -etc., while the upper horizontally extending portions, fit into the- -notches 45 of the rings. These portions act as guides and positioners. In Fig. 7 is shown one of the slides346 in which'a forked' pro lection is provided at the lower edge instead 5 of a single projecting piece. These slides346 and a slmilar'slide 346' are used only in the later.- 1.1 Lever- 12 (Fig. 2) is made up of two parts plvoted on a rod '53 supported b the frame,

the two parts being he d as one y spring 54 in the well known manner.' Thatportion of the lever which cooperates with shutter 29 is shown in detail in Fig. 8. When shutter: 29 is moved to; the left (Fig, 8) it enters" the, l

slgt provided for-that r '12 thereby permitting to be drawn down under-the tension of'sprin 155 which causes the lifting of that end 0% the lever inengagement with cam 13. Cam 13 is thereby released-which, as intedout above, will cause the rotation of movement of the shutter 29 is caused by impulses of either positive or negative direct current through magnet 35. As the disc totates the shutter is moved to one side or the other ofthe disdin accordance with. the pomu stationary iscs 36 .7!

are shaped generally a reason to :appear ,110

urpose in the lever J t his end of the later 'scl. The 12.3

'or retained in the same position depending upon the position taken by shutter 29. That is, if shutter 29 is in the neutral position (aligned with the diseithere will be no mo-, tion of the slide and hence no changein the position of the associated contact spring; If, however, the shutter is moved to the right of the disc as shown in Fig. 3 a slide. whichhas its lower projection to the right- 'of the Fig. 6, the contacts being held closed through the correspondingslide 46 by means of arm 52. As soon as the disc starts to rotate these contacts are all opened. 4

Referring now to Fig. 1 the central station is referred to generally asCS and the remote station as RS having two line conductors L 1 and L-2 connecting them. 1 Keys 100and 101 at the central station control respectively switches 200 and 201.at the remote station. Onlytwo keys and two switches with the associated apparatus are shown in order to simplify the drawing but the-number of switches that may be operated is li nitcd only'by the capacity of the distributors.

The distributor at the central station is disc will be moved to the left of it, Also'if designated by 102 and that at the remote the shutter is atthe left of the disc, a slide station by 202. These distributors are the having its projection also to the left will be moved to the right of it. Again, if the shut-- ter is at the right of the disc no change will be madeinthe contact springs by a slide if the projection is at the left of the disc and in the same'way nochangeoccurs-if the shut-- ter is to the left o'f'the disc and the projction isto the rightofthe disc. It will also be seen in Fig. 3 that slides 46' associated withspring pile up s 39 are always moved to make contact by means of piece 52. Arm 51 serves to restore slide 46'. Theznormal'position of these'contactsis open.. Arms 49, do notoperate slides 46 but come into'pla-y only with the type of slides used in the last three positions and shown in Fig. 7. The forked projections of the\ slides 346, 346 permits the disc to pass through them instead of tor one sideof thefprojection as in the other slides. Notch.28l. is provided in disc Ito allow the forked projections.- on slides 346 to' pass across the-disc 1 when positioned'by arms 49, 50. This modification is made necessar because ofthe code of values mentioned lustrates in a manner sn'nilar to-that of;

'3, how the slides may be moved to the right or left of the disc or remain in' the, neutral position. In the neutral position no springs in .the associated pile-up -make contact.

.These slides,'however, are always brought to.

neutral position by arms 49,150" and-then? moved in accordance withthe position f. the shutter. r

i In the stopping position the contact spring sons which will appear later, to havethree pairs of contact springs holding three, dif-.

ferent circuits closed. Inthis position-thereare no ,springs corresponding to those in the series. designated generally .by- 38-,

and hence 1160 slide corresponding thereto;

This

. contact I spring arrangement is shown. in

broken upon same as those. described above but it will be notedithat thecontact spring arrangement of the distributor at the central station is somewhatdi fierent from that tor at the remote station,-the reason for which will appear later. I I

v Associated with key 100 are three signal lamps 103, 104 and 105. Lamp 103 is white and is lighted only when a switch is being operated.- If, for any reason, the switch does not operate or the propersindication is not sent back, lamp 103 will-continue to be lightof the distribued thereby' notifying the operator of suchfailure. Lamp 104 is green and is lightedwhen the corresponding switch 200 at the remote station-1s open while lamp 105 is red andwheri lighted-indicates that the switch is closed Each key and switch has 3. .001-

responding arrangement-of lamps.

At the remote statlon are two mechanically locking relays 203=and 204 to controhrespectively', the action of switches 200 and 201. Relay 205 is the main control relay at there'- mote. station and is. only actuated when the proper code of pulses is received'in the last three distributor positions to close circuits to operate the power switches. Relay 206 controls the starting'of the. distributors fo'rgiv- 'ing the indication or answer-hack signals. Relay 207 shortcircuits' relays 2 0oto insure its deenrg'ization' after it has 7 upon the reception of a code of pulses. It also insures the energization of relay 206.

.A relayi106 at the central station impulses.

been emergizedf- III:

ch is operated when the contacts f key 107 are; closed starts the system to" send controlling This relay locks up when operutors are rotating, its locking circuit being distributor .102 upon the operation of relay the completion of rotation 10f] -|z'a'- The distributors 102 and 202 are shown in the :stopping positionl' Ineach distributor lim- X, Y and Z are always actuated by arm 52 -(Figs. 2 and 4) while the contacts in positions B, C, D .'X, Y, and Z are sition A, the contacts are closed and there are no contacts operate d-by'the shutter. In the last three positions of distributor 102 at the central station, there are. no contacts-actuated by the shutter. This simplification may be had in the system represented since after a power switch operates automatically at. the

remote. station, the operation of the particu-' such operation more pronouncedly than if there were merely a change in signal lamps This manual operation has been found to be of considerable importance. 1

It is understood that the representation of shutter 29 of distributors 102 and 202 of F ig. 1 is not to be taken literally and that this shutter actuates only the middle spring of the contact springs inpositions B, C, D etc.

To illustrate the operation of the system let it be assumed that switch 200 at the remote station is to be opened. To do this, keys 100 and 107 at the central station are operated. Key 107 mustalways be operated when a switch is to be controlled'from the central station. I r

When key 100 is operated, the upper group of contactschanges the polarity of spring 109 in position C of distributor 102'fr0m positive to negative. ily apparent from the drawing since the upper spring of the upper group of key 100' is connected to the positive lead from battery 110 while the lower spring of the u per groupis' connectd to the negative lead 0 the battery. The middle spring of the upper group is directly connected by means of conductor 111 to spring 109. Key 101 is similarly arrangedwith its middle spring connected to a corresponding spring in position D. I

. The lower group of contactv springs of key 100 controls the505volt lamps .105. With the springs in the position shown, 7 lamp 105 (red) is the only oneclighted-over a circuit from- 50- volt battery 112, conductor 113,, lamp 105, conductor "114, middle and left springs ifi position C of the distributor, conductor 1'15to'the batte' When key 100 is operated, lam 10.5 rema ns lighted and lamp 103. becomes lighted overa circuit from battery lig conductors 113, 116, lower and midl dle spiings of the lower. group of key 100,

operated by theshntter 29 when pulses are 5 received by the magnet. In the stopping po-' tion and-the key at the central station corre-.

nets of distributors 102' switch for the dispatcher to perform a manual operation which will impress upon him This "change will be read- 'IIIOVES 'spring in 103, 104 and,

'commonconductor 131 from arms 52 (Figs. 2 andj) lezive lamp 103, conductor 114; middle and left I springs in position C of the distributor, conductor 115, tobattery. The lighting of lamp 103 indicates that key 100ihas been operated and that the corresponding remote switch is to be operated. -When key 107 is operated to close its con- I tacts relay 106 is energized over'a circuit from positive lead of battery 110, contacts of key 107, left pair of contacts in position A of the distributor, winding of relay 106, outer armature and contact ofrelay 108 to negative lead of battery. 'Upon energizing relay 106 it at-) tracts its armatures 117 to 122, inclusive.

Armature 117 closes a locking'circuit over i an obvious path. Armature I18 closes a circuit to put positive current through the magand 202 in parallel to start them rotating by the rele 'se'of arm 12 as explained above in connectionwith Fig. 2; that is to say, the magnets .102, 202 in moving the shutters29 into the notches in the levers 12permit the springs 55 to draw these levers down causing the lifting of the other ends of the levers ivhi'ch engage the earns 13.

These cams are thus released to cause therodiscs 1, as previously explained in This circuit may be traced from posi tation of detail.

'tive lead of battery 110 through associated conductor 126,1-ine conductor L=1, conductor232, left,-middle and right springs in positionA of distributor 202, conductor 233, through the magnet of distri' utor 202, line conductor L2 to battery 110. Armature 119 changes the polarity on right springs in positions B and X of distributor '102 from negative to positive while armature 120 repositive polarity from right spring in position Y- leaving it at zero potential and position Z through relay 10.8 over obvious circuits. Armature 122 in opening. its back contact opens. thecircuit from line. L-l throu magnet of stributor 102 so that this magnet will not be actuated by impulses impressed on line conductor L,-1 by distributor 102. At its front contact armature 122 connects armature 121 puts negative potential 0h right tions- C, D, etc. toline L1 to actuate the magnet and shutter of distributor 202 at the remote station which ,inturn operates the middle spring of group C', D, etc. as explainedabovea, 1 126 As the distributor disc starts rotating iand the contacts in' position A of both distributors, these contacts h conductors 129 and 130 to the P springs. in posi- 12 i I made and key 107 again operated.

\Vhcn position B is reached, contacts of distributor 102 will be closed by arm 52 and a positivepu'lse is sent through conductor 126, to the line conductor Ll. At the same instant, contacts 13 of distributor 202 at the remote station will be likewise closed thereby energizing relay 207 over a circuit extending fr m the negative lead of battery 208, condu tor 209, contact springs in position B, (pnductor 2,10, Winding of relay 207, conductor 211, to positive lead of battery 208.

. 1n energizing the left armature of relay 207 shortcircuits relay 205 to insure that it is deenergized over anobvious circuit. At its right inner armature relay 207 closes a circuit to insure that relay 206 is energized. This circuit may be traced from the positive lead of battery 208, conductor 211, right inner' armature and associated contact of relay 207, conductor 212, winding of relay 2%, conductor 213, left armature and associated contact of relay 205, conductor 214, middle auxiliary contacts of switches 200 and 201 to the negative lead of battery 208. At the right outer armature of relay 207, a circuit is closed from line conductor Ll, conductor 215, right outer armature and associated contact of relay 207, conductor 216, magnet of distributor 202 to line. conductor L2.

From the above,it will be seen that the positive'pulse sent by contacts in the B position of distributor 102 to line conductors L 1 traverses the magnet of distributor 202 and returns to battery 110 over line conductor L2.

As the magnet of distributor 202 is energized, the shutter of the distributor is ac tuated and the middle spring in position B of distributor. 202 is moved out of contact with the right. spring and into contact with the left spring. This'arranges a direct and permanent circuit from line conductor Ll through the magnet to line conductor L2.

'The right outer armature and contact of relay 207 serves merely to insure the connection from line conductor Ll through the magnet until the B contacts are changed.

It will be recalled that when key 100 was operated, the polarity of the right spring 109 of position C of the distributor 102 at the central station 'was changed from positive to negative. As the distributor "disc ro tates'contacts in positionC, distributor 102, are closed, and a negative pulse is sent through the magnet of distributor 202 at the remote station over a circuit which'may be traced from the negative lead of battery 110, lower, andmiddle springs of upper group of key 100, conductor 111, right spring 109 i and left spring in position C of distributor 102, conductor 131, contact and armature 122 of relay 106, conductor 129, line conductor middle and left springs in position B of distributor 202, conductor 216, magnet of distributor 202, line conductor L2 to battery.

spring in position C from contact with the left spring to contact with the right spring. This connects positive side of battery 208 to the left spring over a circuit which may be.

traced from the positive lead of battery 208, conductor 217, lower Winding of relay 203, upper springs of upper auxiliary contacts of switch 200, conductor 218, middle and right spring of position C.

As the d 'sc and shutter of distributor 102 continue to rotate, springs in positions D, etc., are operated but since only key '100 was changed, no change has occurred in these springs and hence no change willbe made in the springs in position 1) etc. of distributor 202 until the last three positions are reached. As explained above, when relay 106 at the central-station was energized, its armatures closed contacts making the polarity of the right springs in positions X, Y and Z positive,

-zero and negative, respectively. Therefore,

as distributor 102 actuates the springs in Ll, conductor 215 at the remote station,

already traced to actuate the magnet and I shutter of distributor 202 and hence move right spring in position X of distributor 202 to contact with .the left spring, move middle spring in position Y from contact with the left spring to the middle position so that it does not contact with either the right or left spring, and move left spring in position Z tb' contact with the right spring. When the springs in positions X, Y and Z- have" been so moved, a circuit will be established for energizing relay 205 which may be traced from the positive lead of battery 208, o'on-.

ductor 211, winding of relay 205, conductor 219, springs in position Z, springs in position X, conductor 220, springs in position Z which are momentarily closed, conductors 221 and 209, to negative lead of battery 208.

Relay 205 upon energizing attracts its an matures 222 to 225, inc1usive.- Armature 222 closes a locking circuit for the relay over an obvious circuit. Armatures223 and 224 connect positive and negative leads, respectively,

of battery to left and right springs in positions C, D,.etc. Armature 225 opens the energizing circuit for relay 206;

The importance of the operating code is seen from what has just preceded. This is obvious as regards springsin positions X and Z. If the middle spring in position Y had remained in contact with either the right or left springs and the springs in positions X and Z had functioned properly, the relay.

- hereinafterin connection with 205 wouldhave been, shunted by means of conductor 226 and the relay would not have been energized. f

As stated above, armatures 223 and224=of 6 relay 205 connect ositiveiand neg tive leads of battery 208 to eft and right sp ings', respectively, 'in positions and D, etc. Therefore, since the middle'spring of position C is now in contact with the right spring, 10 current will flow from positive lead of bat-- tery 208 through conductor 217 ,"lower winding of relay 203, upper springs of upper auxiliarycontacts of switch 200, conductor 218, middle and right springs in position 0, associated contact andarmature 224' of relay 205 tonegative lead of battery. The lower winding of relay 203 .is thereby energized and armature 237 is attracted towards the lower pole-piece thereby breaking the energlz ng 29 circuit for the solenoid of switch 200 which circuit was maintained 'from positive lead to battery 208, conductor 227, solenoid of v switch 200, conductor 228, associatedcontact d armature 237 of relay 203, conductor 229, to negative lead of battery.-

Plunger 230 of switch 200 is therefore permitted to drop opening contacts 231 ofpower line (not shown); also changing contact spring arrangement of the auxlliary contacts. The upper group of contacts arranges a circuit for the energization of the upper Winding ofrelay 203 for closing switch 200 when desired. The lower-group changes thepolarity on the-right spring of position frompositive to negative to give the. answer bapk signal. The function of the middle I group of auxiliary contacts W111 be explalned the automatlc .operationof the power switch.

' It was sta ed above that the negative lea of battery 1.10 at the central station was con- 'nected' 'to the ht spring in position Z of distributor 102 ough the winding of relay 108.- When contact ismade at position to 4 transmit the negative. pulse, relay 108 is enand closes its armatures 132 and- 133. Armature 132breaks the holding circuit of relay 106 thereby1permitting it-torelease its Armature 133 now connects thenegativelead from "the battery through the win of relay 108 to insure that the negativep' transmitted to the remote'stationhas the same .duration as the other pulses. .U the completion of a revolution of each distributor it is sto pod by raised portions 49 v 'omdisc lflwhichli lever 12'to engage cam of 1 as previously 131:0 the rotation descri in'detaiLg I v a to the remote station, it 'was stated tllilatwhen relay 205 attlactafelitsj armatures, ta mum 'ng circuit or i I," 206 wasopencchpermittmg' its armature-tab close its back contact, When the disc reaches pping position A a positive pulse will than n ed tt to again start the distributors 'tion C, conductor 114,-lamp 104 to p a continue to rotate-and m This pulse may be tracedfrom positive lead of battery'208, conductor 211, armature-and back contact of relay 206-,conductor 234-, middle spring of position A and in 1 parallel through both distributor magnets, one path being throughleft spring of position A, com 'ductor: 232, line ,L1, conductor129, armature 122 and back contact of relay106, con: ductor 130,- through magnet of distributor 102, line L.2to battery 208. The other path is from middlespring in position A of distributor-202, right spring in position A, con-1 ductor 233, the magnet of distributor 202, line L2, to battery 208'. I

In position B of distributor 102 at the central station, the right ,spring is now con-. nected to the negative lead ofbattery 110"- through armature 1190f relay 106 and a negative pulse is sent over line L1' as previously' traced. is actuates the magnet of distributor 202 and returns middle spring in. position B" of distributor 202 in contact-with the right spring. At the same time, springs inposition B of distributor 202 close a circuit-through relay 207 whichmaybe traced from positiye' lead of battery 208, conductor 211, winding of" relay- 207, .conductgr 210, springs in position B of distributor 202, conductor 209 tonegative lead of battery;

Relay 20? upon ener iging attracts its ar matures aid at I its le armature' closes a I shunt-ing circuit around relay 205 to deenerglze it, at its inner 'rightarm'ature'it closes an energizingcircuit alrend traced for re-.'- lay 206 whic "thereupon locks up; its. other armature has no function" during this operation. Distributor 202 is now in condition to. transmit pulses and distributor 102. to recelve. 7 position C, distributor 202 transmits'a negative pulse since the ri ht spring is con nected to negative lead of 'attery 208 as'expla'lned'above. The middle spring in positlon C of distributor102 is therefore moved out of contact with the left spring and 1111:91 4! colitact with-the right spring. This-o the circuit for lamps 103 and 105 which were traced aboveand closes a circuit for lamp 104 which may betraced from battery 112, conductor 113, right and middle springs m V at.

- The distributors positions X, Y and Z "of distributor "102 negative, positive and zero pulses are sent from} the central station to actuate the jet of distributor 202 to return the sp tions X, X and Z"=of distributor 1 original positions. pulses pass from a the respective leadscf battery 110,,through armatureslm and 1200f relay 106 through commonieonductors124, 126, line conductor i 1, conducto1235' it 'th; rYemote, station, sprmgsm p'os ons an :in" uen conductor 236 through thengagnet ordistri b utor202, line conductor-Mto-betterj 110. .c

the following: Let it The dist ributors then stop position A closing the contacts preparatory to the next op-' eration. 1

The next operation for closing a switch such as 201 at the remote station 15 the same as above except that the springs in position of distributor 202 are changed and due to the position of the upper group of auxiliary contacts of switch 201, a circuit is closed through the upper winding of relay 204 upon 'theoperation of relay 205 ture of relay 204 closes a'circuit through the solenoid of power switch 201.

In case 0 ing the permanent opening of a power switch, it IS always necessary to send a man to ascertain the trouble and this man will be required to change the position of the armature of the controlling relay, such as 203, to again put the switch under the control from the central station after the abnormal condition has'been removed.

This will be more clearly understood from be assumed that the abnormal condition on the line, controlled by power switch 200; continues long enough, so that a switch, such as 238 lenoid of switch 200 is-therefore opened and plunger 230J'drops changing the auxiliary' contacts. p v

The upper auxiliary proup'ofcontacts prepares a circuit throug the upper winding of relay 203 and as explained above the arupon sends a positive mature 237 is changed in positon,'manua'lly, to prepare it for control from the central station. When the switch changes, the middle of contacts momentarily. opens the energizing circuit for relay 206 which therepulse from the 'distributor, ma nets starting the distributors, as cxplaincc above. The upper group changes the polarity on the right spring in position C of distributor 202 from positive to negative.

The distributors then operate as explained above in givin an indication except that inposition C of distributor 102, the middle s ring will be moved into contact with the right spring, and 104 to be lighted over a circuit which may be traced from battery 112,,conductor 113, right and middle springs in position 0' 6f'distr1butore102, conductor 114, in arallel' through lamp v104 to battery, and t rough therefore operate lamp 103, middle and upper sprin s of lower group of. key 100 to battery. With both the white and green lamps lighted the dispatcher knows that the corresponding switch has Keys 100 and 107 are acted automatically.

key 100 extinguishing distributors againmaking lamp 103 and the so that the armaan abnormal line condition cans be transmitted from in conductor 227, 'is automatically opened. As such circuit thereby causing both lamps .103

two revolutions for actuating and indicating,

thereby leaving the system in condition for again closing switch 200- when required.

both distributors" to start them rotating.

*Thisoperation is merely to check the system as to the indications.

- When the contact of key 127 is closed positive lead ofbatte 110 is connected through conductor 123, mi dle and right pairs of con- 5 tacts in positionA of distributor 102, through the magnets of' distributors 102 and 202 in 1 parallel as traced above, through the line conductor 15-2 to battery 110. Since relay 106 has not been energized, no'impulses will istributor 102 in post tions C, D, etccbut in position B, a minus mpulse will be transm1tted,in position aminus impulse, in position .Y, a positive pulse, and in position Z, nojimpulse, and therefore contacts B will be set fortransmit-- ting indication impulses and relay 205, will not be energized and hence only one revolu:v .tion of the distributors will be made to check the indication.- i 1, If the indications arecorrect'the polarity of the springs in positions C, D, etc. of distributor 202 will'be the same'as before. No change will occur in the springs in positionC, D, etc. of distributor 102 and hence nochange in the signal lamps.

If, howeve r,a power switch such as 200 at the remote station has changed position without the proper indication havin been given,

or if for some reason the system as not functioned properly the indication lamps. at the central station will not be lighted in accordto point out that in the above hence all the power switches operated'with onecomplete operation (two operations) of the-distributors.

It' is understood that modifications may be made in the :system as outlined above and still be within the scope of this invention,

which isato'be limited'only by'the appended claims.

What is claimed! is:-

1." In a remote control station, a remote station, lineconductors joining said stations, a pair of distributors one at each station associated with said 0011-- ductors, devices at the remote station to be operated, circuits at the remote station controlling the operation of the same, keys at the. control station for said devices, means system, a control I v joining ductors, operated,

tuate said. contacts,

including said conductors whereby the distributor at the control station and said keys prepare the individualcircuits jointly with the other distributor, means.actuated by the distributor at the control station, after said circuits have been prepared, for transmitting a definite code of impulses to the other distributor, and means at said distributor a'ctuated thereby to complete the prepared circuits. I 2. In a remote control system, a control station, a remote station, line rconductors said stations, a pair of distributors one at each station associated with said 'condevices at the remote station to be circuits at the remote station con trolling the operation of the same, keys 'at the control stationrfor said devices, means the disd including said conductors whereby tributor at the'controlstation and said keys prepare the individual circuits jointly with the other distributor, contacts on the disstation, means actuatat the control station.

transmitting a definite code of impulses tothe other distributorto cause the same to ac-' means actuated thereby to close 'saidl prepared circuits, signaling devices at the control station, circuits-for operating the same, means whereby the distributor at the remote station prepares the individual signaling -circuits jointly with the other distributor, dependent. upon the position of said-devices,.and means actuated bythe distributors in completing. the signaling" cycle for resetting "the code'receivin 'g con-f tacts.

joining said statlons,

' 23. In a remote control system, a: control station, a remote st'atign, line conductors a pair of vdist-rlbut'ors one at each station associated with said conductors, control ma trolled thereby on said distributors, devices I at said remote station to be operated, meansets' and. {slides conincludin keys'at the. control stationfor said '-devices or changing. the-potentialon contacts on said control distributor, means in-,

-1ng said prepared circuits to change the posieluding said distributor for connectin said contacts in succession to the remote distributor magnet to actuate slides thereof'corresponding to the actuated keys, pared b the movement of said slides, means actuate by the control distributor for clostion of the devices corresponding to the actuated keys, signals at said control station,

and means actuated by the devices in changjug-their positions for operating the corresponding signals through the medium of the magnet and slides on the distributor at the control station.

4. In a remote control system, a control station, remote station, line conductors joining saidstations, a pair of distributors one at each station associated with said conv actors, control magnets and slides controlled thereby on said distributors, devices at said remote station'to be operated, means including keys at the control station for said. devices for changin the potential on' contacts on said contro distributor, means in eluding. said distributor for connecting said contacts in succession utor magnet to actuate slides thereof corresponding to the actuated keys, circuits pre pared b the movement of saidslides, means [the remote distributor, means including said distributor for connectin said contacts in succession to the control istributor magnet to actuate the slides thereof corresponding to the. contacts whose potential has been changed, and circuitsclosed by the actuation of said slidesjto actuate signals corresponding to the position of said devices.

y In witness whereof, I hereunto. subscribemy name this 13th 1925, I i e il LOUIS nfroi'rsl circuits 'preto the remote distrib: 5

day of N oveinber, A D. i 

